St Charles Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Week Ago Avg. | $3.43 | $3.73 | $4.08 | $3.81 | $2.94 |
| Month Ago Avg. | $3.42 | $3.73 | $4.08 | $3.81 | $2.94 |
Highest Recorded Average Gas Price In St Charles Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $3.81 | 01/01/26 |
| Regular | $3.43 | 05/01/26 |
Top 10 Gas Stations & Cheap Fuel Prices in St Charles
Mobil in St Charles (3000 N MO-94 )
3000 N MO-94 , St Charles, Missouri,
$3.15
May 29, 2026
0¢ Cashback
QuikTrip in St Charles (225 N Kingshighway St)
225 N Kingshighway St, St Charles, Missouri,
$3.15
May 29, 2026
0¢ Cashback
QuikTrip in St Charles (2260 1st Capitol Dr)
2260 1st Capitol Dr, St Charles, Missouri,
$3.17
May 29, 2026
0¢ Cashback
Phillips 66 in St Charles (2675 W Clay St)
2675 W Clay St, St Charles, Missouri,
$3.19
May 29, 2026
0¢ Cashback
BP in St Charles (1980 S MO-94)
1980 S MO-94, St Charles, Missouri,
$3.19
May 29, 2026
0¢ Cashback
Mobil in St Charles (2311 Upper Bottom Rd)
2311 Upper Bottom Rd, St Charles, Missouri,
$3.19
May 29, 2026
0¢ Cashback
ZX in St Charles (2000 Campus Dr)
2000 Campus Dr, St Charles, Missouri,
$3.19
May 29, 2026
0¢ Cashback
Mobil in St Charles (1401 S 5th St)
1401 S 5th St, St Charles, Missouri,
$3.19
May 29, 2026
0¢ Cashback
QuikTrip in St Charles (4646 S MO-94)
4646 S MO-94, St Charles, Missouri,
$3.19
May 29, 2026
0¢ Cashback
QuikTrip in St Charles (1500 Zumbehl Rd)
1500 Zumbehl Rd, St Charles, Missouri,
$3.19
May 29, 2026
0¢ Cashback
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Gas Data Methodology
The fuel prices published in this guide are based on the results of research completed by Way.com’s data team. Using a mix of external and internal data, we analyzed millions of prices across U.S. ZIP codes and globally.